In most previous models, simulation of the temperature generation in tissue is based on Pennes bio-heat transfer equation, which implies an instantaneous thermal energy deposition medium. Due to long relaxation time τ (20 s–30 s) biological tissues, actual elevation during clinical treatments could be different from value predicted by bioheat equation. The wave model (TWMBT) defines a describe heating ultrasound exposure. this paper, COMSOL Multiphysics 3.5a, finite element method software...

In the field of hot rolling process monitoring, activation non-linear dynamic behaviour may render procedure fault diagnosis more difficult. Principal component analysis (PCA) is known as a popular method for but it basically linear method, pass over some useful features system behaviour. One possible extension PCA kernel (KPCA), owing to use functions that allow introduction dependences between variables. The objective this study address problem (in terms activation) in automation using...

The pressure fluctuations in both the rotating runner and other fixed components a model Francis turbine under various loads were experimentally measured by means of onboard measuring equipment data storage device on shaft this study. Large observed small guide vane opening large conditions. Flow separation at blade suction surface led to for openings, unsteady flow around inlet side openings. correlation between turbine, mainly draft tube, was analyzed detail (12 deg) (30 deg). results show...

Accurate prediction of the rolling force is critical to assuring quality final product in steel manufacturing. Exit thickness plate for each pass calculated from roll gap, mill spring, and predicted force. Ideal scheduling dependent on a precise pass. This paper will introduce concept that allows obtaining material model parameters directly process an industrial scale by uniform differential neural network. On basis characteristics distribution can fully characterize solution space enhance...

Under the impact of seismic forces, strain conventional anchor cables tended to increase sharply in an instant, which could easily cause fail due stress overload. This study aimed optimize design rock supporting methods under dynamic disaster events such as earthquakes and bursts. A scale model specimen with a mechanical sliding device was designed based on anti-seismic cable. The working mechanism response were studied using static shaking table tests. results show that force, undergo...

In the phase-field modeling of brittle fracture, anisotropic constitutive assumptions for degradation stored elastic energy due to fracture are crucial preventing cracking in compression and obtaining physically sound numerical solutions. Three decomposition models, spectral decomposition, volumetric-deviatoric split, an improved their effects on performance studied. Meanwhile, stiffness may lead a small remaining crack surfaces, which violates boundary conditions can cause unphysical...

Hot strip rolling production is a high-speed process which requires control and communication system, but because of the long distance between delivery stand finishing mill gauge meter, dead time occurs when transported from site actuator to another location where meter takes its reading, seriously affects thickness effect. According model developed based on measured data, filtered Smith predictor applied predict deviation mill. At same time, an expert PI controller feature information...

There are many factors which influence the slope stability. In order to analyze degree of importance each factor on stability, this paper establishes a stability analysis model based BP neural network. The computation results showed that was reasonable and reliable. On basis, sensitivity various analyzed by single-factor test, were internal friction angle rock, bulk density, pore pressure coefficient, angle, rock cohesion height in descending sensitivity.

This study introduces the technical specifications and technological process of aluminium single-stand 4-high cold rolling mill, analyses mathematical model process. The automation system adopts 3-level computer control, which actuators sensors (Level 0), basic level 1) 2), to realise network data tracking, dynamic adaptive procedure setting, self-learning automatic control whole described has been in full commercial operation after a large number functional performance tests. effectiveness...

Thickness accuracy of plate production depends on Automatic Gauge Control (AGC) in the mill area.A typical modern thickness control system design and implementation a steel is discussed together with impact process models, available measurements, actuators material properties.A highlevel software approach provides ability to make quick accurate modifications both loops tuning constants.Control loop strategies theoretical concepts rolling are discussed.Performance results achieved during...

A closed-loop control system for the hydraulic gap (HGC) that is driven by electrohydraulic servo valves developed practical application. Based on mathematical model estimated a identification technique, algorithm designed, and fuzzy inference rules re established. The simulation field test results of step response position tracking carried out HGC cold rolling mill show when compared with conventional PID system, self-tuning has characteristics fast response, short rise time, no lag, small...

In current engineering, the transition process of pump turbines from to turbine mode mainly includes shutdown operating and startup operating, switching working conditions mostly depends on opening closing ball valve. While, this article focuses transitional condition without relying valve, which will significantly reduce response time unit enable quick in emergency situations. study, torque balance equation is employed analyze entire flow system operation. Additionally, entropy production...